There's a comprehensive interview with Bill Williams at CBR about the Spike: The Devil You Know comic. It gives a lot of details about the direction of the series but I did find out at least two important things:1) It's a 4-issue miniseries - I thought this was the full-blown Spike spin-off and2) This is set in between AtS #32 and #33.

I might yet explore this when it comes out - well, the first issue at least.